TIA-920-A: Measurement of Wideband Digital Phones
Complete sequence for testing wideband digital phones to the TIA-920-A standard
TIA 920 is a comprehensive US standard for measuring wideband digital phones. Handset, headset and speakerphone functions are all included. The standards apply to VoIP phones, as well as USB audio devices such as headsets, speakerphone attachments, and webcams. The module is a large structured set of sequences and subsequences which perform all the measurements. Curves and values are shown on the screen, tolerance checks are performed, and data is saved to Excel spreadsheet files. Completely prompted sequences for calibration of all the transducers are included. After a one-time setup with a sound card and other user-specific interfaces, the sequences are automatic. They run by simply selecting, pressing start, and following prompts where user interaction with the device under test is required. The sequence works with approved sound cards for connection to the transducers. Windows audio devices such as USB headsets work directly with SoundCheck®. VoIP softphones also work with SoundCheck, by means of a recommended third-party Windows audio application.
- Head and Torso Simulator with handset positioner
- Mouth Simulator
- Power amplifier (if needed to power artificial mouth in Head and Torso Simulator)
- SoundConnect Microphone Power Supply
- SCM microphone or equivalent
- Acoustic calibrator
- Telephone interface for VoIP, digital, or other system
- SoundCheck 13 Advanced (part #1103)
- Loudness rating module (part #2007)
- Wave file equalization module (part #2013)
Note: This sequence has only been verified to work with SoundCheck version 13. If you are using a different version, please check with your sales engineer before purchasing.
Setup and calibration
Due to the complex nature of this sequence, please refer to the detailed instructions that are provided as part of the package
Please contact your Listen sales engineer or representative to learn more about, or purchase this sequence.